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Finding the Fourth Proportional to 699,337.21, 965,083.93 and 393,413.81

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Solution

The fourth proportional to 699,337.21, 965,083.93 and 393,413.81 is: 542,910.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,337.21 : 965,083.93 = 393,413.81 : x
  2. Step 2: Convert to fraction form
    699,337.21/965,083.93 = 393,413.81/x
  3. Step 3: Cross multiply
    699,337.21x = 965,083.93 × 393,413.81
  4. Step 4: Simplify right side
    699,337.21x = 379,677,342,275.07
  5. Step 5: Solve for x
    x = 379,677,342,275.07/699,337.21
  6. Step 6: Final answer
    x = 542,910.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.